Stuart perry



@einen glatte latent @ffies A IMPROVEMENT IN CHAIN-WHEELS FOR CHAIN HORSE-POWER.

tlgt Stlpbule nient tn iu llgeic rltrts llntrnt mit mailling putti the nmz.

TO ALL WHOM IT MAY GONGERN:

'Be it known that I, STUART PERRY, of Newport, in the county of Herkimer, and Stute of New York, have invented certain new und useful Improvements` in Chnin-lVhcels, for running a, chain with regular or irregular lengths or sizes of links, for horse or other powers; and I do hereby declare the following to be n full, clear, und exact description of the sume, reference being had to the accompanying drawings, making n part of this description or specification, in whichf, Figurel represents e top plan of one of the chain-\\^heels, with e chain around it und. around n pulley driven by it. l

Figure 2 represents u sideclevution of the sume. l Figure 3 represents nvview ofv the under side ot' the upper plute ot' the chain-wheel. Figure 4 represents n view of the upper side of the under plete of the chain-wheel, with a. portion of u. chain, shownin red linefs, in connection with it; and also, in red, theyielding of the cogs, und spring for restraining or returning them after the chain hns pressed them towards the centre. I Figure 5 represents a. side and front view of one of the cogs which I prefer to use. Similar letters of reference, where they occur in the Sepurnte figures, denote like parts in all ofthe drawings. Owing to the vnriednnd vnryinglengthsef the links ot' un ordinary chain, permanent eogs, or projections or recesses, to take such links cannot he used without much friction or slipping; and when such eogs, teeth, or other holding surfaces are even made adjustable und then fastened, the difference in the texture of the metal in the seme chain, or in the cogs, will cause uneven wearing, und this will again cause unequal lengths of links,

My invention consists in so making`or uniting the cogs to the chain-wheel as that they may yield when they do not come properly between the links; but when they do come between the links they shall remain out,

" and keep the chain from slipping; and thus the links of .tho chain may be of unequal lengths; but some two or.

more of them will always find n cog 0r tooth that will take between them and hold; and when they do not, and are pushed back or into the wheel, they at leest do not retard the wheel by clinging to the chain.

To enable others skilled in the art to make and use my invention, I will proceed to describe the sume with reference to the drawings.

The chainqvheel is cast-in two'parts, an upper one, A, and on under one, B, and each having :i series of rzidial recesses, a a a, Sac., to receive a. series of cogs or teeth, b, which een movein seid recesses, but cannot drop out of the wheel. In thc interior of the wheel, und behind the cogs or teeth b, there is n ring, spring, or rubber disk, c, against which the cogs or teeth come wllen pressed in towards the centre of the wheel, nhd which restrnins seid teeth or cogs, or aids in again projecting them from the interior. The cogs or teeth b, es seen in fig. 5, have horizontul'grooves or recesses l to take the horizontal links ot' the chain; end the corners above und below the groove, as et 2, are rounded or sha-pcd to take the rounded ends of the vertical links of the chain. When the end of a. vertical link, as et 3, fig. 2, comes against one of the cogs or teeth b, as there shown, theA cog or tooth will remain out, and prevent thc chain from slipping on the wheel, compellingr the lutter to move with the former. When, however, the vertical links come against thc ends of the cogs or teeth, instead of against its sido, they, ot` course, cannot hold upon it, and such cog'or tooth, instead of remaining in its position, where it can do no goed, and might do much injury, is simply pushed into or towards the centre of the wheel, und out of the way, for the time being, but isreturned nguin, so ns to be -in position, when s link comes around that will take against its side, but to be pushed in as often as the links take it otherwise. The red lines in tig.

4 show the position of the cogs or teeth, and of the ring or spring behind them, when pushed in by the chain links; also shown in red.

The chain, as shown in fig. 1, encircles about two-thirds of the perimeter of the wheel; 'und if one single link ofthe chain in ell that distance finds a. oog or tooth to receive it, ns shown at 3, fig. 2, the chein of course cannot slip, und the wheel must move with it. In practice it is found that many of the links or" those ,encircling the wheel urein contact with 'e cog or tooth that is fairly holding it, and the others that do not receive and hold a, link are v4pushed in out of the wey, and otter no friction or resistance when they cannot actually exert a propeiling action. In s chain that enen-cles one-half, or even one-third, of the perimeter of the wheel, it is found l u that there is no slipping, es there is always one or more cogs or teeth that receive one ormo're links, and thus avoid any slipping; but if even the chain did slip` it could only do so to the extent of the length of one llink, for that would bring some link exactly where itwas required to take a cog that would hold. Itis immaterial, therefore, whether the links of the chain .be of uniform vlengths or not, for all are not required to take xed positions in relation to the recesses or projections, cogs or teeth, on the chain-wheel, and one is snliheient to prevent it from slipping; and those that do not so actareout of the way, and the chain cannot cut, wedge. or clog on them.

It is obvious that, where eogs or teeth are permanently fixed upon the chain-wheel, er' even where they are adjustable, but held fast after adjustment, a chain, however accurately made at yiirst, would not, for any length of time, take them with any degree of accuracy; and the result is lmuelrcutting, wearing, chafing, friction, and loss of powcr,vall of which I avoid by simply allowing the cog or tooth that does not properly receive the end of the link s'o as to hold it to get out of the way, and not detract from or injure the working parts.

I have described my wheel as horizontal. I do not limitits use to suchposition. It may be vertical or inclined. I have also represented and described the cogs or teeth as movingradially in slots er recesses, being pushed in by the chain, and returned by a spring. I do not confine myself to such solely, for swingcogs or teeth can be used on one or on both sides of the chain. When on one side, then the chain on the other side bears on the flange of the wheel. These swing-cogs are so constructed that, whichever of them are inthe way of any of the links when passing on t0 their hed, arepresserd. in/out of the way; and such ofthem Vas happen to come-between the links `remain out and keep .the chainfiom slipping; and such swing-cogs may be moved by gravity, or by springs, or by a cam or cams,:or'b'y centrifugal force; andinstead of non-yielding bearing surfaces, where the links'take against the cogs or teeth, friction-rollers may be used; but the best form and construction is that first above described. and shown in the drawings. The cogs er teethvmay be hardened by any of the usual processes, or of vast, cast steel or ofvchilled iron. The chain, too, may be cemented or.

hardened in the well-known ways.

C represents a wheel or pulley for holding up the chain D. This wheel C is hung upon a spindle, E, thatA is set in a hed or plate, FLthat is forced away from the chain-wheel proper hy a coiledjor other spring', d, to keep the chain taut; and, whilst the wheel is more especially designed for horse-powers, I do not restrict my invention solely te such a use of the wheel, as it may.' be used with other' machines, as, for instance, hoisting machines, or capstans, or any wheel or pulley where it is desirable to use a chain having unequal lengths of links, and to preventl it from slipping. v

Having thus fully described my invention, what I claim as new, and desire to secure by Iietters Patent, is- A chain-wheel having sliding or yielding-cogsor teeth, so that a chain made up of links of unequallengths 'can be run thereon, and some of the links always find a tooth or cog that will receive and hold them, and those not so receiving and holding are moved out of the way, as and for the purpose substantially as described.

I STUART PERRY. Witnesses JOHN' G. Banni', Guo. L. BRADFORD. 

